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to degrade targeting informa --Apple-Mail-661-757607755 Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Hi Paul, On 20-Oct-09, at 9:10 PM, Paul S. Boyer wrote: > I have a source who tells me that the military version of GPS is > incredibly accurate. If you let the receiver sit in the same place > for a day, it will attain an accuracy of less than a millimeter. > I think they may be leading you on. ;-> My understanding is that such accuracy is simply not possible. Since the end of SA there is no "military version" of GPS - the best resolution is available to everyone. As I understand it the best unaided GPS can do is ~ 10 m. In the United States, augmented by the WAAS system of 25 land-based reference stations, its possiblen achieve an accuracy of <1.0-1.5 m. In Europe the similar EGNOS system (with 40 ground stations and three geostationary satellites) provides an accuracy of ~ 2.0 m. I don't think that the present technology allows for better resolution than this. Cheers! Chris Christopher Majka Halifax, Nova Scotia, Canada B3H 2G5 c.majka@ns.sympatico.ca "If you don't know where you are going, you will wind up somewhere else." - Yogi Berra --Apple-Mail-661-757607755 Content-Type: text/html; charset=US-ASCII Content-Transfer-Encoding: quoted-printable <html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; = -webkit-line-break: after-white-space; ">Hi Paul,<div><br><div><div>On = 20-Oct-09, at 9:10 PM, Paul S. Boyer wrote:</div><br = class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div = style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; = -webkit-line-break: after-white-space; ">I have a source who tells me = that the military version of GPS is incredibly accurate. If you = let the receiver sit in the same place for a day, it will attain an = accuracy of less than a = millimeter.<div><br></div></div></blockquote></div><br></div><div>I = think they may be leading you on. ;-> My understanding is that such = accuracy is simply not possible. Since the end of SA there is no = "military version" of GPS - the best resolution is available to = everyone. As I understand it the best unaided GPS can do is ~ 10 m. In = the United States, augmented by the WAAS system of 25 land-based = reference stations, its possiblen achieve an accuracy of <1.0-1.5 m. = In Europe the similar EGNOS system (with 40 ground stations and three = geostationary satellites) provides an accuracy of ~ 2.0 m. I don't think = that the present technology allows for better resolution than = this.</div><div><br></div><div>Cheers!</div><div><br></div><div>Chris</div= ><br><br><div apple-content-edited=3D"true"> <span = class=3D"Apple-style-span" style=3D"border-collapse: separate; color: = rgb(0, 0, 0); font-family: 'Times New Roman'; font-size: medium; = font-style: normal; font-variant: normal; font-weight: normal; = letter-spacing: normal; line-height: normal; orphans: 2; text-align: = auto; text-indent: 0px; text-transform: none; white-space: normal; = widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; = -webkit-border-vertical-spacing: 0px; = -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: = auto; -webkit-text-stroke-width: 0px; "><div style=3D"word-wrap: = break-word; -webkit-nbsp-mode: space; -webkit-line-break: = after-white-space; "><div><span class=3D"Apple-style-span" = style=3D"font-size: 14px; "><div>Christopher Majka</div><div>Halifax, = Nova Scotia, Canada B3H 2G5</div><div><a = href=3D"mailto:c.majka@ns.sympatico.ca">c.majka@ns.sympatico.ca</a></div><= div><br></div><div><i>"If you don't know where you are going, you will = wind up somewhere else."</i> - Yogi = Berra</div></span></div><div><br></div></div></span><br = class=3D"Apple-interchange-newline"> </div><br></body></html>= --Apple-Mail-661-757607755--
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